Environmental water conservation cistern



FIG. 1 is a perspective view showing the top and side of the environmental water conservation cistern;

FIG. 2 is a top plan of the device of FIG. 1;

FIG. 3 is a side elevation as viewed in the direction of arrow 3 of FIG. 1 of the device of FIG. 1; and

FIG. 4 is a bottom plan view of the device of FIG. 1. 

The ornamental design for an environmental water conservation cistern, as shown. 